A new documentary is set to show viewers what's lurking below deck on a mega cruise ship.

The 90-minute one-off show, called Secrets of the Mega Cruise Ship and airing on Channel 5 tonight, explores how the £1billion MSC Seaside operates.

In an exclusive sneak peek shared with MailOnline Travel, the ship's giant laundry room can be seen, along with a big waste pipe where excess food is thrown into the water to 'feed the fish'.

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A new documentary is set to show viewers what's lurking below deck on a mega cruise ship. The 90-minute one-off, called Secrets of the Mega Cruise Ship and airing on Channel 5 tonight, explores how the £1billion MSC Seaside operates. Above, a view of the laundry room

The ship's big waste pipe where excess food is thrown into the waters to 'feed the fish'

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Returning to the laundry room, one worker laughs as she highlights how important having freshly washed linens and clothing is to the running of the ship.

'This is huge, without the laundry there's nothing gonna [sic] happen,' she chimes.

In another clip, the ship's engineering room is shown here with the workers ensuring everything is... shipshape

The MSC Seaside, which launched in 2017, is the 18th biggest cruise ship in the world. In total, it weighs 153,516 tons and can accommodate 5,179 passengers, along with 1,500 crew

One of the crew members looks at a diagram showing the inner workings of the ship

The MSC Seaside, which launched in 2017, is the 18th biggest cruise ship in the world.

It weighs 153,516 tons and can accommodate 5,179 passengers, along with 1,500 crew.

Such a big ship requires everything to be done on a mass scale, as the yet-to-air documentary shows.

'This is one of the most huge generators in the world,' one worker says from the depths of the engineering room, while chef Ulrich highlights that 'any cruise ship this size is the biggest food operation in the world'.

A spokesperson for MSC Seaside told MailOnline Travel that each week, 107,499 plates are served in the dining rooms.

And over the course of seven days 140,000 eggs are used, 18,000kg of fresh fruit is sliced and 5.1 tons of flour is sifted.

Such a big ship requires everything to be done on a mass scale, as the yet-to-air documentary shows. A spokesperson for MSC Seaside told MailOnline Travel that each week, 107,499 plates are served in the dining rooms

Chef Ulrich highlights that 'any cruise ship this size is the biggest food operation in the world'

Over the course of seven days 140,000 eggs are used, 18,000kg of fresh fruit are sliced and 5.1 tons of flour is sifted

Channel 5 cameramen travelled on board the MSC Seaside while it journeyed around the Caribbean from Miami

This is all washed down with 8,000 bottles of wine, among other tipples.

Channel 5 cameramen travelled on board the MSC Seaside while it journeyed around the Caribbean from Miami.

Commenting on the TV project, MSC Cruises' managing director for the UK and Ireland, Antonio Paradiso, said: 'It is an honour to have this great opportunity to show the British public another of our beautiful ships and all the onboard features we are famous for, whilst also offering a unique behind-the-scenes look at the goings on of one of the world’s most advanced cruise ships.

'There is no better way to demonstrate how fantastic cruising is than to physically show people, and this feature-length documentary provides a great opportunity to do just that.'

Secrets of the Mega Cruise Ship airs on February 18 at 9pm on Channel 5.